Hi everyone. After a bit of advice / suggestions before I embark on tiling my bathroom floor. It’s on 1st floor with floorboard subfloor (see pics). It’s relatively flat but runs out of level by about 10mm at the door (presumably because there’s a thermalite wall held by joists that side. My initial plan was to Hardie board with flexible adhesive underneath then tile 200x200mm on top. I can’t really afford therefore to build up at the door by 10mm as the threshold would be really high. Any advice? Do I just go with a flat but out of level floor, or is there another way? Will I run into problems tiling?

